Abstract
The Scherrer equation is a widely used tool to obtain crystallite size
from polycrystalline samples. Its limit of applicability has been
determined recently, using computer simulations, for a few structures
and it was proposed that it is directly dependent on the linear
absorption coefficient (mu(0)) and Bragg angle (theta(B)). In this work,
a systematic study of the Scherrer limit is presented, where it is shown
that it is equal to approximately 11.9% of the extinction length. It is
also shown that absorption imposes a maximum value on it and that this
maximum is directly proportional to sin theta(B)/mu(0).
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